langchain/docs/versioned_docs/version-0.2.x/integrations/document_loaders/mongodb.ipynb

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   "source": [
    "# MongoDB"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "[MongoDB](https://www.mongodb.com/) is a NoSQL , document-oriented database that supports JSON-like documents with a dynamic schema."
   ]
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  {
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   "source": [
    "## Overview"
   ]
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    "The MongoDB Document Loader returns a list of Langchain Documents from a MongoDB database.\n",
    "\n",
    "The Loader requires the following parameters:\n",
    "\n",
    "*   MongoDB connection string\n",
    "*   MongoDB database name\n",
    "*   MongoDB collection name\n",
    "*   (Optional) Content Filter dictionary\n",
    "*   (Optional) List of field names to include in the output\n",
    "\n",
    "The output takes the following format:\n",
    "\n",
    "- pageContent= Mongo Document\n",
    "- metadata={'database': '[database_name]', 'collection': '[collection_name]'}"
   ]
  },
  {
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   "source": [
    "## Load the Document Loader"
   ]
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   "cell_type": "code",
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   "source": [
    "# add this import for running in jupyter notebook\n",
    "import nest_asyncio\n",
    "\n",
    "nest_asyncio.apply()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "from langchain_community.document_loaders.mongodb import MongodbLoader"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "loader = MongodbLoader(\n",
    "    connection_string=\"mongodb://localhost:27017/\",\n",
    "    db_name=\"sample_restaurants\",\n",
    "    collection_name=\"restaurants\",\n",
    "    filter_criteria={\"borough\": \"Bronx\", \"cuisine\": \"Bakery\"},\n",
    "    field_names=[\"name\", \"address\"],\n",
    ")"
   ]
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     "execution_count": 12,
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   "source": [
    "docs = loader.load()\n",
    "\n",
    "len(docs)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Document(page_content=\"Morris Park Bake Shop {'building': '1007', 'coord': [-73.856077, 40.848447], 'street': 'Morris Park Ave', 'zipcode': '10462'}\", metadata={'database': 'sample_restaurants', 'collection': 'restaurants'})"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "docs[0]"
   ]
  }
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